Pipe cutter



May 6 1924.

' 1,493,452 A. JARDINE PIPE CUTTER- Filed July 2l, 1923 2 Sheets-Shea? 1 May s 1924. 1,493,452

A. JARDINE PIPE CUTTER Filed July 21, 1925 2 sheets-sheer 2 Patented May 6, 1924.

ANDREW Jeanine, or HESPELER, ONTARIO, CANAD,

.PIPE CUTTER.

T 0 all wlw/m 'it may conce-rn.'

Be it known thatl, ANDREW JARDINE, of Hespeler, in the county of llfvaterloo, Province of Ontario, Canada, `a subject of the King of Great Britain, have invented certain new and useful Improvements in Pipe Cutters, of which the following is a specification.

This invention relates to pipe cutters of the type which are clamped on to the pipe just back of the point at which the pipe is to be cut, the pipe being heldin a vise or4 of the cutter relative tothe rate of rotation of the cutters and also ensuring that the cutters will be` fed at the samespeed relative to one another.

A further object is to devise a cutter which is capable of cutting dierent sizes of pipe within predetermined limits, and in which the cutters may be quickly fed to tne point at which cutting is to commence, and quickly. retracted after cutting. has been completed.

I attain my objects by means of the`con-. structions hereinafter described andl illustrated in the accompanying drawings in which- Fig. 1 is a lfront elevation, partly` broken away, of my improved device; v 4 Fig. 2 a rear elevation of the same; v Fig. 3 a section taken on the line 3-0 in Fig. 1.;

Fig. 4 a sectionv takenon the line 444 in Fig. 1

Fig. 5 a front elevation of a modifiedk form of construction; n

Fig. 6 a section on-the line (5*6 in Fig. 5; and y y Fig. 7 a section on the line7-7 inFig. 5. Referring particularly to Figs.` 1` to 4, 1 is a head, on the rear side of whichare mounted in suitable guides .the radially adjustable clamping members2. These vclampc -the head 1 by means of Application led'July 21,1923. Serial.; No. 632,963;

Maa

ing members are actuated by means ofscrews 3 threaded into lugs 4 formed on or secured to the rear of the base 1 and forming part of4 ther aforesaid guides. The head, it will be seen', .is provided 'withl a central opening 5 through which the end of the pipe is passed when the deviceis to be clamped on thepipe. y v v Surrounding the opening 5 and secured to cap screws 6 is thel annularbearing' 7.

Secured at one `end to the head 1 is a pin 8. c The end of thepin is of reduced diameterforming a` shoulder which engages the vforward side of the head. The portion of reduced diameter ispassed througha hole f in the'head 'andvhas a nut 9 threaded on ,its` outer end so that the head is firmly gripped between the nut V9 andthe shoulder. Preferablya boss 10 is formed on the rear side ofthe `head wherel the pin 8 passes through'to provide increased support for l l the pin.. L

'Rotatablyl'mounted on the 8 isthe'.

pinion 11, which pinion. is provided with a hub or shaft 12 atv its' forward side, kpreferably integral therewith.

tionally yengagevthe side of 'the pinion l11. On the hub-12fisthreaded the clamping nut 14 bymeans of which the pinion 13 may be Thisfhub adjaf `cent-the pinion 11, is formed as a bearing yfor the pinion 13- which is adapted to `i'fricclamped. against th'epinionll so as to be A,

driven thereby. Preferably however, Iv interpose between the clamping nut andthe pinion '13 the annular disk `15.

Rotatably mounted on the bearing 7 and meshing with the ypinion 11L isthe driving gear v`16. I preferablyform partly in the bearing 7 and partly on the gear 16 a groove in which is received a ring 27 to assistin retaining the gear in positionl on thebearing. `'Ilhi'sgear 16v is provided with an an-4 'Y nular rib 17, rwhich serves as a vbear-ing on which a feed gear 18 may rotate. This y gear y 18l meshes' with1 the lpinionvl.

Mountedin the headis the plunger '34, y v l the point of which is adapted to lbe engaged with the teethv ofthev gear 18, but-'is nor- Inally held out of., such engagement by means of a suitable spring-jy l 1 Securedtothe rib 17 by means of suit- .i

carrier are formed guides20. in which KVthe 'slides 21 are movable to, and from? the work.

able screws is the cutter carrier 19, onwhich i Each cutter 22 is secured to its slide by a retainer or clamp .13, secured to the slide by means of cap screws. ln the carrier 19 below each slide 21 is formed a slot 211. Secured to each slide and extending through its corresponding slot 24 is a pin 25, the end of which extends into a spiral groove 2G formed in the side of the feed gear 18.

he pinion 11 and gear 16 and the pinion 13 and gear 18 are so proportioned that the gear 18 will be driven slightly faster or slower than the gear 16.

The method of operation of the construction hereinbefore set forth is substantially as follows: lWhen a piece of pipe is to be cut, the device is clamped on the pipe by means of the clamping members 2. As it is desirable to feed the cutters forward to the cutting position as rapidly as possible, the clamping nut 14: is loosened to release the frictional engagement of the pinion 13 with the pinion 11 and the plunger 34 is engaged with the teeth of the feed gear 18 to hold the latter stationary. The handle is then turned and through the pinion 11, the gear 16 is rotated. As the carrier 19, which carries the slides and cutters, is secured to the gear 16, the cutters are rotated about the pipe, and, therefore, through `the engagement of the pins 25 in the spiral groove 26. the slides, and therefore the cutters, are rapidly fed forward into position ready to cut the pipe.

1n order to cut properly. however, it is necessary that the rate of feed be regulated relative to the rate of rotation. The clamping nut 1e is therefore tightened up to frictionally engage the dislr 15, the pinion 13 andthe pinion 11 with one another so that they will all rotate together. The handle is a turned and through the pinions 13 and 11. the gears 18 and 16 are both rotated. Owing to the proportioning of the pinion 11 and gear 16 and the pinion 13 and gear 18. the gear 18 will be rotated very slightly faster or slower than the gear 16 and the feed of the cutters will therefore be considerably slower than when moving the cutters into cutting position.

To retract the slides and cutters it merely necessary7 to operate the handle to actuate the hub or shaft 12 in the reverse direction. but to secure speed of retraction,

yslide is located a threaded member 28 with which is adapted to mesh a screw 29 journallcd in a frame 30 carried by the driving gear 16a. At one end of this screw is mounted so as to rotate therewith a bevel pinion 31 which :neshes with a bevel gear 32 formed on the side of the feed gear 18a.

The means for operating the gears 16a and 18't is also arranged differently. The

hub 12a is arranged as a separate part jour nalled intermediate its ends in the head 1. This hub is provided with a passage therethrough in which is inserted the shaft 8a. The hub at one end is provided with an enlargement 33. Secured to the shaft 8a at one end is the pinion 13a. while lreyed on the hub at the other end of the shaft is the pinion 11a. -The shaft adjacent the pinion 11EL .is threaded. and on this threaded portion is screwed a clamping nut 14a.

The handle 35 is then actuated to rotate the shaft 8a. rlhe clamping nut le is in the re Jracted position and therefore the pinion 11a and the gear 16a are idling. The pinion 13a, being secured to the shaft and positively driven thereby, the feed gear 18a is drivento actuate the pinion 31 and screw 30, the latter through the threaded member 28 mo fing the slide 21 and cutter to the'cutting position.

The nut 141- is then tightened up to frictionally the pinion 13a with the enlargement 33 on the hub 12a, the nut bearing against the end of the hub. |lhe pinion 11a thus rotates the gear 16a and the cutters are therefore rotated about the pipe as they are fed forward into the pipe. Y

As in my preferred construction. all that is necessary to retract the cutters is to opcrate the handle 35 in the reverse direction, but it is preferabie to first release the frictional engagement. between the pinion 13, and the enlargement on. the hub 12a by loosening the clamping nut 14. I

T@rom the above description it will be seen that l have devised constructions which will satisfactorily attain the object of my invention as set out in the preamble of this specification. l

`What 1 claim as my invention 1. In a pipe cutter. the combination ot' a head adapted to be. clamped on a pipe and having an opening through which the pipe may pass; an annular driving member rotatably mounted in the head concentricallv with said opening: a feed member rotatable relative to the driving member. said feed member havingformed in the side thereof a spiral groove having a plurality of convolutions; a cutter support adapted to be ro tated about the pipe by said-driving member: and a pin on the cutter support errtending .into the spiral groove.

2. In a pipe cutter, the combination of a head adapted to be clamped on a pipe and having an opening through which the pipe may pass; a cutter driving gear rotatably mounted on the head; a cutter feed gear rotatable in the head; a cutter mounted to slide to and from said opening and rotatable lac about said opening by the driving gear;

4means whereby the feed gear effects the having an opening throughwhich the pipe may pass; a cutter driving gear rotatably mounted on the head; a cutter feed gear rotatable in the head; a cutter mounted to slideto and from said opening and rotatable about said opening by the driving gear; means whereby the feed gear effects the sliding movement of the cutter; an actuating shaft; a pinio-n fast on the shaft meshing with one of said gears; la second pinion rotatable on the shaft meshing with the other of said gears; and means for giving the rotatable pinion a driving connection with the fast pinion.

4. Ina pipe cutter, the combination of a head adapted to be clamped on a pipe and having an opening through which the pipe may pass; an annular gear rotatably mounted in the head concentrica-lly with said opening; a cutter carrier rotatable with said gear; a cutter support slidable on said carrier to and from said opening; actuating means for said gear; a-nd means actuable by the actuating means for moving Vthe cutter support to and from the work.

5. In a pipe cutter, the combination of a head adapted to be clamped on a pipe and having an opening through which the pipe may pass; a cutter ldriving gear rotatably mounted on the head; a cutter feed gear rotatable in thehead; a cutter carrier rotatable with the driving gear; a cutter support slidabley on said carrier to and from said opening; means whereby the feed gear l effects the sliding movement of the cutter; common means for actuating the two gears; and means for freeing one of the said gears from its driving connection with the actuating means at will.

6. In a pipe cutter, the combination of a head adapted to 'be clamped on a pipe and having an openingthrough which the pipe may pass; a cutter driving gear rotatably mounted on the head; a cutter feed gear rotatable in the head; a cutter-carrier rotatable with the driving gear; a cutter support slidable on said carrier to and from said opening; means whereby the feed gear effects the sliding movement of the cutter;

an actuating shaft; a pinion fast on the shaft meshing with one of said gears; a second pinion rotatable on the shaft meshing with the other of said gears; and means for giving the rotatable pinion a driving connection with the fast pinion.

7 In a pipe cutter, the combination of a lhead adapted to .be clamped on a pipe and having an opening through whichv the. pipe may pass.; a plurality of cutter supports mounted toslide to and from said opening and also rotatable about said opening; 'an actuating shaft; and differential gearing actuable by said shaft to rotate the cutter supports about the opening and -to feed',

them'at a relatively slow ratev towards the work, said differential gearing including a member having formed in the sider thereof a spiral groove having a plurality of convolutions; andapin on each cutter support extending-into the spiral groove.

v8. In a pipe cutter, the combination of a head adapted to'be clampedfon a pipe and having an opening throughwhich the pipe may pass; a cutter mounted to slide to and' from said opening; and also rotatable about said opening; an actuating shaft; differential gearing actuable by said shaftto rotate the cutter about the `opening .and to feed it at a relatively slow rate towards its work; and means for disconnecting a porf tion of the differential vgearing to vary the rate of movement of the cutter to and from the opening. v f

9. In a pipe cutter, the combinationof ai headv adaptedto be clamped on apipe and having an opening through `which a pipeVV may pass; a driving gear rotatably `mounted on said head about the opening; a cutter carrierA rotatable withv said gear; la feed gear having a spiral groove` in the Aside thereof and rotatable relative to the driving gear; a cutter support slidable radiallyv of the carrier; a pinion adapted to drive the driving gear; a pinion adapted to drive the feed gear; means for simultaneously l0. In a pipe cutter, `the combination of a head adapted to be clampedy on a pipe and having an opening through which a'pipe may pass; a driving gear rotatably mounted on said head about the opening; a cutter carrier rotatable with said gear; a feed gearhaving a spiral groove in the side thereof and rotatable relative to the driving gear;

a cutter support slidable radially ofthe l carrier; a pinion adaptedt-o drive the driving gear; a hub on one side of said pinion;

a pinion rotatable on said hub and adapted f to drive the feed gear; means for frictionally engaging said pinions with one another,

said pinions and gears being proportioned kso that the gears will vrotate at different speeds relative to one another; and a pin on. the cutter support extending into the spiral groove. i

11. In a pipe cutter, the combinationv of a head adapted to be clamped on a pipe and having an opening through which a pipe may pass; a driving gear rotatably mounted on said head about the opening, Said gear having an annular rib thereon; a Cutter Carrier rotatable With said gear; a feed gear rotatably mounted on rib and having a spiral groove in the eide thereof and rotatable relative to the driving gear; cutter support slidable radiallyY of the carrier; a shaft; a inion rotatable With the shaft to drive the driving gear; a pinion on said shaft and rotatable relative thereto adapted to drive the feed gear; means for friotionally engaging the last mentioned pinion with the first mentioned pinion; means for preventing the rotation of the feed gear when the pinione are ont of friotional engagement with one another; said pinions and gears being proportioned so that the gears will rotate at different Speeds relative to one another; and a pin on the cutter supportextending into the spiral groove.

12. ln a pipe entter7 the combination of a head adapted to be clamped on a pipe and having an opening through which the pipe may pass; a cutter driving gear rotatably7 mounted on the head; a cutter feed gear rotatable in the head, said cutter feed gear having formed in the eide thereof a Spiral groove having a plurality of oonvolutions; a cutter carrier mounted to Slide to and from said opening and rotatable about said opening the driving gear; a pin on the entter carrier extending into said groove; common means for actuating the two gears; and means for freeing the Cutter driving gear from its driving connection Withthe aetuating means at will.

13. ln a pipe cutter7 the combination of a head adapted to be clamped on a pipe anl having an opening through which the pipe may paas; an annular driving member rotatably mounted in the head Concentrioally With Said opening' a feed memberv rotatable relative to the driving member, Said feed member having formed in the side thereof a spiral groove having a plurality of eonvolntions; a plurality of cutter supports adapted to be rotated above the pipe by said driving member; and a pin on each cutter support extending into the spiral groove.

Signed at Toronto, Canada, this 26th day of June, 1923.

ANDREW JARDINE. 

